I2C Logic level converter schematic

5 responses to “I2C Logic level converter schematic”

1. 
   Stephane 24/11/2015 at 10:19 | Permalink | Reply

   Hi. First, nice job and sorry for my english. One question. If i want to connect 4 RPI or Arduino to each one LCD, I needed 4 logic level converter ?
   Thanks for your help.
   Best regard

   1. 
      Michael 19/01/2016 at 15:34 | Permalink | Reply

      Hello Stephane,
      If you are using I2C then no, converting the I2C connection to 5v or 3.3v only needs to be done once. All devices requiring 5v or 3.3v would just be connected to the same I2C connection on whichever side of the converter provides the voltage the connected device calls for.
      Hope that helps.
      Good luck

2. 
   Max 06/09/2019 at 04:54 | Permalink | Reply

   Hi

   Do i need to add pull up resistors to both sides or R4,R5, R6,R7 are there to serve as pull up resistors?

   Im trying to connect TEA5767 with Arduino UNO do i need to use a level converter ?

   1. 
      admin 06/09/2019 at 13:43 | Permalink | Reply

      R4,5,6,7 are the pull up resistors. Check the datasheet of the TEA5767 IC to see if it is 5V tolerant.

3. 
   Max 07/09/2019 at 01:23 | Permalink | Reply

   According to the TEA5767 datasheet maximum supply voltage is
   5v.
   By the way can i use BS170 as a replacement for 2N7000?